Skip to content

Fix implicit conversion rank ordering #106811

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Sep 9, 2024
Merged

Fix implicit conversion rank ordering #106811

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
4abb34b
Fix implicit conversion rank ordering
llvm-beanz Aug 30, 2024
60af644
Minor tweak to align code with the language spec
llvm-beanz Aug 31, 2024
bca665b
Merge remote-tracking branch 'origin/main' into cbieneman/fix-rank-order
llvm-beanz Sep 3, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 3 additions & 3 deletions clang/include/clang/Sema/Overload.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -225,9 +225,6 @@ class Sema;
/// HLSL Scalar Widening with promotion
ICR_HLSL_Scalar_Widening_Promotion,

/// HLSL Matching Dimension Reduction
ICR_HLSL_Dimension_Reduction,

/// Conversion
ICR_Conversion,

Expand All @@ -250,6 +247,9 @@ class Sema;
/// extension anyway.
ICR_C_Conversion_Extension,

/// HLSL Matching Dimension Reduction
ICR_HLSL_Dimension_Reduction,

/// HLSL Dimension reduction with promotion
ICR_HLSL_Dimension_Reduction_Promotion,

Expand Down
28 changes: 13 additions & 15 deletions clang/test/SemaHLSL/TruncationOverloadResolution.hlsl
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,24 +1,16 @@
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -fnative-half-type -finclude-default-header -fsyntax-only %s -DERROR=1 -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -fnative-half-type -finclude-default-header -fsyntax-only -Wconversion %s -DERROR=1 -verify
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -fnative-half-type -finclude-default-header -ast-dump %s | FileCheck %s

// Case 1: Prefer exact-match truncation over conversion.
void Half4Float4Double2(double2 D);
void Half4Float4Double2(float4 D);
void Half4Float4Double2(half4 D);
// Case 1: Prefer conversion over exact match truncation.

void Half4Float2(float2 D);
void Half4Float2(half4 D);

void Case1(float4 F, double4 D) {
// CHECK: CallExpr {{.*}} 'void'
// CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(double2)' <FunctionToPointerDecay>
// CHECK-NEXT: DeclRefExpr {{.*}} 'void (double2)' lvalue Function {{.*}} 'Half4Float4Double2' 'void (double2)'
Half4Float4Double2(D); // expected-warning{{implicit conversion truncates vector: 'double4' (aka 'vector<double, 4>') to 'vector<double, 2>' (vector of 2 'double' values)}}

// CHECK: CallExpr {{.*}} 'void'
// CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(float2)' <FunctionToPointerDecay>
// CHECK-NEXT: DeclRefExpr {{.*}} 'void (float2)' lvalue Function {{.*}} 'Half4Float2' 'void (float2)'
Half4Float2(F); // expected-warning{{implicit conversion truncates vector: 'float4' (aka 'vector<float, 4>') to 'vector<float, 2>' (vector of 2 'float' values)}}
// CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(half4)' <FunctionToPointerDecay>
// CHECK-NEXT: DeclRefExpr {{.*}} 'void (half4)' lvalue Function {{.*}} 'Half4Float2' 'void (half4)'
Half4Float2(F); // expected-warning{{implicit conversion loses floating-point precision: 'float4' (aka 'vector<float, 4>') to 'vector<half, 4>' (vector of 4 'half' values)}}
}

// Case 2: Prefer promotions over conversions when truncating.
Expand Down Expand Up @@ -46,7 +38,13 @@ void Half2Half3(half2 D); // expected-note{{candidate function}} expected-note{{
void Double2Double3(double3 D); // expected-note{{candidate function}} expected-note{{candidate function}} expected-note{{candidate function}}
void Double2Double3(double2 D); // expected-note{{candidate function}} expected-note{{candidate function}} expected-note{{candidate function}}

void Half4Float4Double2(double2 D);
void Half4Float4Double2(float4 D); // expected-note{{candidate function}}
void Half4Float4Double2(half4 D); // expected-note{{candidate function}}

void Case1(half4 H, float4 F, double4 D) {
Half4Float4Double2(D); // expected-error {{call to 'Half4Float4Double2' is ambiguous}}

Float2Double2(H); // expected-error {{call to 'Float2Double2' is ambiguous}}

Half2Float2(D); // expected-error {{call to 'Half2Float2' is ambiguous}}
Expand All @@ -55,8 +53,8 @@ void Case1(half4 H, float4 F, double4 D) {
Half2Half3(F); // expected-error {{call to 'Half2Half3' is ambiguous}}
Half2Half3(D); // expected-error {{call to 'Half2Half3' is ambiguous}}
Half2Half3(H.xyz);
Half2Half3(F.xyz);
Half2Half3(D.xyz);
Half2Half3(F.xyz); // expected-warning {{implicit conversion loses floating-point precision: 'vector<float, 3>' (vector of 3 'float' values) to 'vector<half, 3>' (vector of 3 'half' values)}}
Half2Half3(D.xyz); // expected-warning {{implicit conversion loses floating-point precision: 'vector<double, 3>' (vector of 3 'double' values) to 'vector<half, 3>' (vector of 3 'half' values)}}

Double2Double3(H); // expected-error {{call to 'Double2Double3' is ambiguous}}
Double2Double3(F); // expected-error {{call to 'Double2Double3' is ambiguous}}
Expand Down
Loading